EP 1727404 A2 20061129 - Two light level ballast
Title (en)
Two light level ballast
Title (de)
Vorschaltgerät mit zwei Beleuchtungsstufen
Title (fr)
Ballast à deux niveaux de luminosité
Publication
Application
Priority
US 13906805 A 20050527
Abstract (en)
A ballast (100) for powering at least one gas discharge lamp (30) at two selectable light levels includes a sensing transformer (120) and a detector circuit (200). Detector circuit (200) provides an output voltage that is dependent on the states of two on-off switches (S1,S2) interposed between the ballast (100) and a conventional AC source (20). The output voltage of the detector circuit (200) is used to control the illumination level of the lamp (30).
IPC 8 full level
H05B 41/42 (2006.01)
CPC (source: EP US)
H05B 41/42 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1727404 A2 20061129; EP 1727404 A3 20090909; EP 1727404 B1 20120502; CA 2537911 A1 20061127; US 2006267516 A1 20061130; US 7218063 B2 20070515
DOCDB simple family (application)
EP 06010262 A 20060518; CA 2537911 A 20060228; US 13906805 A 20050527